JPH044235U

JPH044235U -

Info

Publication number: JPH044235U
Application number: JP4611490U
Authority: JP
Priority date: 1990-04-27
Filing date: 1990-04-27
Publication date: 1992-01-16

Description

[Brief explanation of the drawing]

第１図は本考案一実施例の防爆形電磁流量計検
出器の電極部構造を示す断面図、第２図および第
３図はそれぞれ従来技術の防爆構造の電極部から
のリード線の取り出し方式を示す要部断面図、第
４図は従来技術によるリード線の取り出し方式に
おいて生じるリード線のたるみを説明するために
電極間を磁束方向から見た簡略図である。１……測定管、３……ボス、５……キヤツプ、
５ａ……円板部、５ｂ……円筒状栓部、６……電
極、６ａ……首下部、６ｂ……小径部、８……絶
縁体。 Fig. 1 is a cross-sectional view showing the structure of the electrode part of an explosion-proof electromagnetic flowmeter detector according to an embodiment of the present invention, and Figs. 2 and 3 show methods for taking out lead wires from the electrode part of the conventional explosion-proof structure, respectively. FIG. 4 is a simplified view of the area between the electrodes viewed from the direction of magnetic flux, in order to explain the slack of the lead wire that occurs in the lead wire extraction method according to the prior art. 1...Measuring tube, 3...Boss, 5...Cap,
5a...Disc part, 5b...Cylindrical stopper part, 6...Electrode, 6a...Neck part, 6b...Small diameter part, 8...Insulator.

Claims

[Scope of utility model registration request]

In an explosion-proof electromagnetic flow meter detector whose entire detector case has a pressure-resistant explosion-proof structure and whose electrode part has an intrinsically safe explosion-proof structure in order to satisfy the explosion-proof structure, measurements are taken concentrically with the electrode mounting hole of the measurement tube made of a non-magnetic pipe. A non-magnetic cylindrical boss formed to protrude from the outer surface of the tube, the thickness of a disk portion that seals the open end of this boss, and the cylindrical shape that protrudes from this disk portion and fits into the inner surface of this boss. A cap made of a non-magnetic material whose length satisfies the depth dimension of the joint surface between the flameproof explosion-proof structure and the intrinsically safe structure, and an insulating bushing in the electrode mounting hole of the measuring tube. The lower part of the neck is fitted into the tube through the pipe, exposing the liquid contact head inside the pipe, and is attached liquid-tightly by the fastening mechanism, and the lower part of the neck is formed to have a small diameter and extends through the stepped part at a part beyond the fastening mechanism. It comprises an electrode that concentrically penetrates an insulator that is concentrically attached to the disc part of the cap and protrudes outside the cap, and a lead wire that is connected to the tip of this electrode that protrudes outside the cap. An explosion-proof electromagnetic flowmeter detector characterized by having an electrode structure.